水平地震力作用下浅埋偏压隧道松动围岩压力的研究  

Rock failure pressure of shallow tunnel subjected to horizontal seismic and unsymmetrical loads

作　　者：杨小礼[1] 黄波[1] 王作伟[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中南大学学报（自然科学版）》2010年第3期1090-1095,共6页Journal of Central South University:Science and Technology

基　　金：全国百篇优秀博士学位论文基金资助项目(2005050);湖南省自然科学基金资助项目(09JJ1008)

摘　　要：在考虑水平地震力影响的基础上,对浅埋偏压隧道围岩压力进行研究,求出破裂角及隧道围岩压力的解析解。研究结果表明:在埋深较浅一侧,水平地震力对破裂角的影响很小,破裂角随着水平地震力的增大而增大;在埋深较深一侧,水平地震力对破裂角的影响则很明显,埋深较深一侧的破裂角随着水平地震力的增大而减小,例如在Ⅵ级围岩条件下,破裂角的变化率高达38%;水平地震力对隧道拱顶围岩垂直压力的影响不大,隧道拱顶围岩垂直压力随着水平地震力的增大而减小。The theoretical solutions of break angle and surrounding rock pressure of tunnel considering horizontal seismic force were derived for shallow buried tunnels using earthquake coefficient method. The analytical solutions were presented. The results show that the break angle of the shallow-buried side of the tunnel increases with the increase of the horizontal seismic force,while the break angle of the deep-buried side of the tunnel reduces with the increase of the horizontal seismic force. For example,the reducing rate of the break angle of the sixth grade rock is up to 38%. The crown rock pressure of tunnel reduces with the increase of the horizontal seismic force.

关 键 词：浅埋偏压隧道 破裂角 隧道围岩压力 水平地震力 

分 类 号：U455[建筑科学—桥梁与隧道工程]